Wrist-pin mounting and fastening



Jan. 20, 1931. w. .1. TOLLERTON ET AL 1,789,326

WRIST PIN MOUNTING AND FASTENING .Filed Oct. 23, 1925 3 Sheets-Sheet 1 i 21 B %\ill L ululmm%%m 5 l 55 mm&\

35 J. ZZ'gl Z6 Z5 J4 I wlllll 59 Jan. 20, 1931. w. J. TOLLERTON ET AL 1,789,326

WRIST PIN MOUNTING AND FASTENING Filed Oct. '23, 1925 s Sheets-Sheet s WJL'ZZz'cLr/z (I ZbZZerfom George 6000 601277 Jilbezcfi i? Zap 0&2,

I 29 inthe appended claims.

Patented Jana-20, 1931 WILLIAM J. TOVLLERTQNVYAVIND enonen s. GooDwIi oF omcAe nnn swear I;

n grrpA, or Booz ISLAND, IL InoIs jf wnlisr-rin -noumgme iiien ms'm' n ine Application filed October 23, 1925.. 'sena,1no..-e4,4z5;

t Thisinvention relates to wrist-pin-conn'ec- 4 t ons between thecrossheads and connectlng tOdQOi locomotives, and also to means. for

operatively connecting the crosshead .to the 5| valve gear 'Heretofore it has been custornv airy-o to insert the wrist pins from theLinsideof the crossheads and hold the pins'infplace by retaining nuts threaded on theirouter;

- ends; This arrangenient is quiteinconven- 10 lent; and the present nvention seeks to pro-,

vide an improved-arrangement injwhichthe, Wristpin sare inserted from the outside; and are theld against outward displacement and turning by a retaining plate'bolted or a'n-I;

5 chored to thet outer-I face or" the crosshead. Theinvention consists in the features of im'- provernent hereinafter set forth, illustrated; in the preferred forms in the accompanying drawings, and more particularly pointed {out In the drawings, Fig; l is a elevation showing a crosshead mounted'in its guides and connected to the plston andcon nee-ting rods and equipped with the" novel t 25 'wrist pin fastening of our invention.

Fig. 2 is a vertical sectional view taken on the plan of the section line of 22 of Fig-1.; V Fig. 3is ahorizontal sectional view taken on the plan of the section line 3+3 of Fig-1,

1 3o partof the wrist pin being in elevation and partin section to disclose the lubricating v Fig. 4. isa fragmentary inside'elevation'; of

the retaining-plate for the wrist pin,

shown in Fig.9 with part of the same broken D away, and

Fig, 5 is anloutside end elevation of the is iragn entaryelevation showilig n th rform fjcrossheaa mountingpwithir i t nv n io applied thereto; I

1 Ref r ng en-the, w ngs' detail n I ic simila efer' nce characters esignate, corresponding parts throughout theflseveralf v w d s gnat s t gui s n. which the I 1" "e s ead 'sfad p ed. te ec pro ate h n? actu ed by sua ;driv gep enthr u h h pistonrodsf in th usualorfany'p ie red.

ay-I @rossh a has an x ensi n' ocket; 9 n wh ch the end of the piston rod 8 is erted: oarigi c me t on vwith the crossheadt through the; mediuniof ""an inclined or] obliquely extending pinor key 10 which jis ns tedi asirnilarly extend ng: slot 1, ve

t n ing di metri llylofthe xt n ion socket Ean rough a' lrresponding slot. in theend f f he p ston rod which is e gaged" n t-he o e aswill ereadilyappar nt rom Fig,

'1;-0f. he d awings and-to h se k ll di1 1 art T e. I it opp ite Walls 1.2211191 13; having top ottom flanges onn cted, by b ts 5 to. h

beari g: po i ns ll f the cros h d. Whi

C TQ h i liide a a, body ner 0in engage th gui s Ifipr sentcrossheads ar e ployedt ey are either u ps de. 7

down or ehanged from 0 6 to the other side of the locomotive so that openings in the crosshead for-receiving the wrist pins taper.

inwardly, instead of outwardly as is s nsual, and thus permitthe insertionofithe wrist pins from the outside of the crossheads. The] 1 wall or outside portiongf of the crosshead is provided atthe top and bottom with short' spaced; parallelhvertical upper-and lower shor ribs: .1 a d: ith p ce Par aligned verticalfelongated intermediate ribs 17; disposed vertical alignment with the ribs l6and having their shoulders iacingin-v wardly perpendicular to the plane of the 'face or wall of the cros shead. These ribs 7 v V- -fmay beWelded or"otherwiseforrned on'the elevation of aLaird type.

crosshead as usually constructed,

ther nain rod 33 is of uniform diameter at its 7 central portion 19, but the opening in the in- V ner'portion of thecrosshead isltapered to a" v sinalljeriliarnjeteras indicated at-2Q, and that -26 having external threads"engaging the"in- I in its outer portion is tapered from aalarger diameter at the outside as indicated at.21 so as to receive the correspondingly shaped wrist pin, which is machined or finished all over to snugly fit the cylindrical and tapered openings of the rod and crosshead. The

.wrist pin may be provided with a' central axial hole or counterbore 22 from which lead oil passages 23 extending radiallyito the pe{ riphery thereof and designed to distribute lubricant or grease from the axial hole in' conjunction with a filling for. partialfilling of hair or felt or other suitablelubricating means which, however, may be omitted if de sired. The counterbore 22 extends to the outer end of the Wrist pin and is preferably tappedto take a plug or closure screw-24 at the outer end thereof and at the intersection of a diametrically disposedgroove25 across the head of thepin.- However, this tap be provided to receive an oil or greasecu'p ternal threads of the tap and a' wrench head or surface'27 ifor. applying or. removing it and an upwardly curved or elbow-shaped cup-receiving extension 28 projecting out-1' .wardly therefrom but confined within the radiusof the plug or wrench head which is of greater diameter than the width "of the groove 25. V v V A retaining plate 29 is'tightly fitted be-' tween the space-d vertical ribs 16and 17 spaced from the outer face of the crosshead, and is secured or anchored thereto, as .by-

means-of bolts 30 extending through its upper and lower ends. This plate 29 may have an opening 31 of hexagonal or other shape to receive the wrench head 27 of the plugso that the latter; is held from turning and becoming loosened, although it is to be understood that other oradditional means may be provided" for'this purpose. The plate has a transverse tongue or rib 32 at its inner: face intersecting the opening 31 when the latter is employed vertical shearingstrain.

and corresponding substantially in length to the diameter of the outer endof the wrist 'pin so as to extend into the groove or slot 25 and preventturning of the wrist pin. The retainingplate is 'adiustably bolted or anchored to the outer. face ofthe crosshead, so

thatlbymeans. of the nuts on its retaining bolts it can be employedto force the Wrist pin snugly to position and tosecurely hold it against outward displacement. The lugs or ribs 16 and 17 on-the outer face of the crosshead and between which the retaining plate, 'fits, relieve the bolts, of horizontal shearing strain, and the'interlocking, rib and groove 32 and 25which are disposed at right angles to the ribs 16 and 17,.1ielieve the bolts of The bolts however, hold the plate and pin against outward displacement and also serve to' force the 1 pin snugly into the tapered apertures in 65 the inner and outer portions of the crossa 1,789,326 I I it Preferably, as shown, the outer end of the wrist pin is provided with tapped openings, as indicated at 34, for receivlng studor tap bolts for removing the wrist pin after the retaining plate has been removed.

The holes 34 may receive dowels fixed to the retainingplate in lieufof the tongue or rib 32 for preventing the turning of the Wrist pin, but such rib is preferred.

' -The retaining plate'29 is preferably' 'provided with an integral trunnion 35 for connection with andbperation of the valve gear,

the connecting link being retained in position on the .trunnion'by a lock nut 36.

In the form of the invention shown in Figs. 6 to 8 inclusive illustrating afour-bar type of cross-head, the bars are designated at 3? and are spaced' -apart to.takethe bear ings or slides 38' of the crosshead. The lat ter is -of a web construction and includesthe crosshead body 39 provided. with theusualsocket 40 for receiving thepiston rod which} is keyed thereto through the holes 211; The

opposite apertures 42 and 43 receive the wrist" pin wh ich engagesthemain rod between the spaced walls of the crosshead body. The front Wallis prov'idedlwith a flanged'rib 45 extending vertically at'j oneend, with short horizontal ribs 46 nearthe ends thereof and at the top ofthe. crossheadrbody, while a relatively'long horizontal longitudinal rib 47115 provide'd 'at the bottom and spaced from the flangedrib 45, as indicated M48.

The retaining plate is designated at 49 and; hasithe usual rib 50 for engagement "with the groove in the wrist pin as heretofore describech except that in this instance; the rib and groove are extended verticallyw The plate49'1'its between the ribs46 and Hand beneath the fiange of the rib' 45,' while its opposite end has apertures 51 registering with corresponding aperturesin theend of all shearing strain. I V.

the invention shownkin In the form of k V Figs.g9 and,10, there is illustrated La rd type'of crosshead inwhich "the guides are designated at 54. Thecrosshe'ad proper'is designated at -55 andhas asocket 56 for connection with the piston rod inithensual or any preferred way. The front plate of tlie crosshead body is provided with upper'and lower series of vertical ribs'57 and 58 oppos' ing each other in spaced parallel relation to take a retaining plate 59 therebetween. This plate has arib 60 at the inside to engagea diametrical groove in the wrist pin 61. Bolts 62 connectthe opposed'sides of the. crosshead body or walls thereof at thetopand the intermediate bolts also provide fori'th-e attachment of the retaining plate 59. Addi- 'tional bolts or stud screws'63 may be probolts 65 are provided to" extend through c vided' for securing the plate 59 in *position below the intermediate topbolts 62 and between the top portions of the ribs 58. Suit 7 able bosses may-be formed on the front wall of the crosshead body as indicatedlatti l for the purpose of taking th'ebolts 63. Additional aligned openings '66 at the lower end of, the plate 59 and between corresponding portions of the ribs 58'to connect the retainingplate 59 with the front wall of the crosshead body.

In this instance the ribs prevent turning of the plate as in the'previously described formsand therebyalso remove sh-ear' from the bolts.

In the formof the invention illustrated in Fi 11 an alternative arran ement is shown c l 7 p 1 where, due to the construction of the gu de or groove arrangement for the sides of the crosshead, as indicated at- 67, the retaining plate cannot be bolted at the top.. In this form the crosshead bodyflor front wall thereof is designated at 68 and is'provided with a flanged rib 69 at the topoverhanging the retaining plate 70 which has a rib 71,

r on its inner face engaging the ediametrical groove of the wrist pin 72. Ribs are pro- 1 ciples thereof, the scope of which is to be on its outer face on opposite'sides of the pin,

vided at the sides as indicated at 7 3 corresponding to the ribs 57 and 58 as'shown in 'Figs. 9 and 10, between which the retaining plate 70. fits. The retaining plate is also additiona-lly'bolted at the bottom as indicat- 1 ed at 74, thus retaining the plate in position;

It is noted that the retaining plates and the ribs which snugly fit the side edges of the plates are provided with engaging faces that are parallel to the axis of the pin, so that the ribs will securely hold the plate against transverse 1 movement as the latter 'is forced inwardly to apply endwise pres sure to the pin. It is also noted that the retaining plate is substantially rectangular in form and relatively thin and that the fastening devices and bolts engage the ends only of the plate, so that, by tighteningthe bolts, a slight camber may be given to the plate which will automatically take up any wear and prevent any'looseness or endwise play of the pint t c.

While we have shown and described our invention in a preferred form, we are aware 7 that various modifications and changes may be made without departingfrom the prindetermined from the app-ended claims.

WVe claim as our invention:

1. In combination, a crosshead and a crosshead pin, said crosshead having parallel ribs opening and said pin having a transverse groove in its outerend, a retainer plate snugly fitting between said ribs and extending over theouter end of said pin, the engaging surfacesof said. ribs andplate being parallel to'the axis of the pin bolts projectsaid bolts for securing said plate in position and for'forcing the same inwardly between said ribs" to apply endwise pressure {ing .from said crosshea d and extending-r, through the ends of said plate and nuts on to thepin', said plate having a rib on its inner face transverse to the-ribs ofthe crosshead' and fitting within the groove of the crosshea-d pin, substantially as described.

2. In combination, a'crosshead, acrosshead pin fitting inwardly tapering seats in the crosshead and projecting slightly beyond the outer face thereof, a retaining plate extending over the outer face of the'cr-osshead, and

acrossthe outer 'end of said pin, said crosshead having. ribs on.its outer face snugly fitting against. theside'edges of said "plate with the engaging surfaces of the ribs and plateparallel to the ax'isofthe pin andretaining devices engaging the ends of said plate for clamping the plate to, the crosshead and including bolts for forcing the plate in 'wardly to exert endwise pressure on said pin, andsaid plate having an inwardly projecting tongue engaging a groove in the outer end of the pin for holding the latter" against turning, substantially as described.

3. In combination, a crosshead, afcrosshead' pin fitting. inwardly tapering seats in the crosshead and'projecting slightly beyond the outer face-thereof, a substantiallyrectangular, relatively thin retaining plate extending over. the outerface ofthe crosshead and'the outer end of said pin, said crosshead having ribs on its outer face snugly fitting against the opposite side edges of said rectangular plate, the engaging faces of the ribs and plate being, parallel to the axis of the pin, and retaining devices engaging the ends only of said plate'for clamping the latter to I scribed.

WILLIAM J. TOLLE'RTON. GEORGES. GOODWIN. ALBERT F. LEPPLA. 

